... Co.,Ltd is one of the top level wellhead christmas tree manufacturers and suppliers,Website:http://www.zztopdownhole.com, with professional ... 6A -Consist of casing head, tubing head and Christmas tree -Applicable to all the casing and tubing programs and connection ... equipped with pneumatic (hydraulic) safety valve Specification of the X-tree Working pressure (psi) 2M, 3M, 5M, 10M, 15M, 20K Material ...